I just dropped off mine this morning as well and my SA stated it was the first one he had done. They gave me a 2013 X3 xdrive2.8i loaner and the start-stop system in this thing is a bit smoother than my 2012 328i. Hopefully it will be at least better by the end of the software update (or I can always just turn it off now ) Something the SA said which sounds contradictory to what I recall reading around the forums is that while performing this update, the normal procedure is to scan all of the cars modules to make sure they have the latest software in them as well. Mine was just built at the end of May so I'm not sure this will apply to me but thought it was interesting they claim to check them (unless the way the update occurs requires this). Either way, I'm excited to see the difference!

Curious which dealership? I'd like to take mine to be reprogrammed and it might be easier if the place has done this at least once.